Question: What what is system   follows Ediacaran and also which starts with letter c
Paraphrase: Name the system that follows Ediacaran and whose name begins with alphabet C.
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q403523 . ?sbj wdt:P155 wd:Q188654 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 'c')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
Answer: Cambrian, Cambrian